Rolex Ref. 1665 Double Red Sea-Dweller “Patent Pending” with brown Mark II dial.

Additional images

Model: ,

Year of issue: 1967

Reference number: 1665

Serial number:

Condition: worn

Status: sold

Dealer country: Monaco

Price in EUR €: n/a

Watch details

For sale is this:   Exceedingly rare Rolex ref. 1665 double red Sea-Dweller “Patent Pending”. Amazing chocolate brown Mark II dial. Case back featuring “Oyster Gas Escape Valve (Patent Pending)”: the very first models of reference 1665 were sold with the case back engraved (Patent Pending) in parenthesis. Just a dream for any collector the present specimen represents one of the rarest Sea-Dweller.


Corrado Mattarelli


1967 saw the launch of the Oyster Perpetual Sea-Dweller, waterproof to a depth of 610 metres. To meet the needs of professional deep-sea divers, the case was equipped with a helium escape valve so that, during long decompression phases in hyperbaric chambers, the helium from the gas mixtures used could be released without risking damage to the watch. Learn more about the first Seadweller from my RPReport by following this link...

SEA-DWELLER 4000 - 1978

Rolex launched the Sea-Dweller 4000, waterproof to a depth of 1,220 metres (4,000 feet).